Spark Plug Wire Insert - M10x1.0 - 1/2 In Reach - 6/Pk - Heli Coil Products

The Heli-Coil R474-4 Spark Plug Thread Repair Inserts offer a reliable and permanent solution for repairing damaged spark plug threads in aluminum cylinder heads. Engineered for specific M10x1.0 spark plugs with a 1/2-inch reach, these precision inserts restore proper thread engagement and sealing, providing a professional alternative to costly head replacement and minimizing vehicle downtime for mechanics and engine builders.

Key Features

• Precision M10x1.0 Thread Restoration: These inserts are accurately formed to match M10x1.0 spark plug threads, ensuring correct plug alignment and thread profile for optimal engine performance and compression.
• Optimal 1/2" Reach Compatibility: Designed specifically for 1/2" reach spark plugs, these inserts maintain the correct electrode depth within the combustion chamber, which is critical for efficient ignition and consistent engine operation.
• Enhanced Thread Strength: Constructed from high-strength 304 stainless steel, Heli-Coil inserts create a durable, wear-resistant internal thread that often surpasses the strength of the original aluminum, preventing future stripping.
• Durability in Harsh Environments: These professional-grade inserts are resistant to high combustion temperatures, vibration, fuel, oil, and moisture, ensuring long-term reliability in demanding automotive and industrial applications.
• Convenient 6-Pack: Each package contains six inserts, providing a practical quantity for engine rebuilders, general repair shops, fleet maintenance, and powersports service departments.

Applications

The Heli-Coil R474-4 inserts are primarily used to repair stripped, cross-threaded, or pulled-out M10x1.0 spark plug threads in aluminum cylinder heads. They are suitable for a wide range of import automotive engines, motorcycles, ATVs, generators, and various small engines that utilize M10x1.0, 1/2" reach spark plugs. This product offers a permanent repair solution that helps maintain engine compression, proper plug torque, and overall serviceability, making it a valuable asset for engine shops and mobile technicians.

Specifications

• Manufacturer: Heli Coil Products
• Model Number: R474-4
• Thread Size: M10x1.0
• Thread Reach: 1/2" (0.500")
• Material: 304 Stainless Steel
• Quantity: 6 inserts per pack
• Unit Weight: 0.03 lb
• Package Dimensions: 3" x 2.75" x 0.75"